// Copyright 2023 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <Poco/Ext/ThreadNumber.h>
#include <common/likely.h>

#include <atomic>

static thread_local unsigned thread_number = 0;
static std::atomic_uint threads{0};

unsigned Poco::ThreadNumber::get()
{
    if (unlikely(thread_number == 0))
        thread_number = ++threads;

    return thread_number;
}
